Current Status

Poisonous/Cautions

Pub 505 - May be toxic to cattle and horses.
Milky juice irritating on bare skin and ptentially serious rash.

NE Weeds - mildly toxic to cattle

Canadian Poison Plant - Ingesting the plant
has caused loss of cattle in New York State. This plant is usually
avoided by livestock but is ingested if incorporated with hay.
The plant is abundant in in some locations in southern Ontario.
Some humans are sensitive to the irritant latex and may develop
inflammation.

Cornell Poison Plant - referred to Canadian
site

Indiana Toxic Plants: TOXICITY RATING: Moderate.
Spurges are highly unpalatable, and are rarely consumed in quantities
sufficient to cause serious toxicity, but are very irritating
upon contact;

ANIMALS AFFECTED: Any animal consuming spurge
or coming in contact with the sap may be affected; DANGEROUS
PARTS OF PLANT: All parts; CLASS OF SIGNS: Gastrointestinal
irritation, dermal and ocular irritation, poor doer, weakness.

Distribution

Can be found thorughout Ontario in waste areas
and roadsides. Dufferin and Renfrew counties in particular.

Growth Habit

Perennial

Method of Propagation

Seeds, Roots/rhizome

Control

Difficult to control with 2,4-D and intermediate
for dicamba. Listed on 2,4-D, but not on Banvel or Roundup labels.
Apply herbicide at early bud (flowers mid summer) or in early
fall. Repeated mowing at 21 day intervals can be an effective
control.

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